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Lunge exercise method on the stable and unstable support surface. (A) Lunge exercise on a stable support surface. (B) Lunge motion on an unstable support surface. The same exercise was performed for 8 weeks. Exercises were performed in the order of the picture, as follows: the walking lunge, front lunge, side lunge, and barbell lunge. (C) Y-balance test (anterior, posteromedial, and posterolateral). (D) Smart insole.
